Portable telephone



FIG. 1 is a front, bottom, and right side perspective view of a first embodiment of a portable telephone showing our new design;

FIG. 2 is a rear side plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a top side elevation view thereof;

FIG. 5 is a front side plan view therof;

FIG. 6 is a bottom side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The broken line matter in FIGS. 1-7 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portable telephone, as shown and described. 